Chi-Square Test Calculator
Perform chi-square goodness of fit test to compare observed vs expected frequencies
About Chi-Square Test
The chi-square goodness of fit test determines whether observed frequencies differ significantly from expected frequencies.
Formula: χ² = Σ [(O - E)² / E]
Assumptions:
- Expected frequency in each category should be at least 5
- Categories are mutually exclusive
- Observations are independent
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.